Combination screen and storm sash



H. J- BIANCO COMBINATION SCREEN AND STORM SASH March 15, 1966 2 Sheets-Sheet 1 Filed Jan. 18, 1963 wmv r01? Henry J Bianca B Y A TTORA/[YS March 15, 1966 H. J. ammo 3,240,258

COMBINATION SCREEN AND STORM SASH Filed Jan. 18, 1963 2 Sheets-Sheet 2 4/ [4a 22 8 LL22 lA/VEA/ TOR er M United 3,240,258 COMBINATIQN SCREEN AND STORM SASH Henry J. Bianco, Ellicott City, Md., assignor to The Burch Company, Baltimore, MEL, a corporation of Maryland Filed Jan. 18, 15963, Ser. No. 252,520 14 Claims. (Cl. 160-43) the frames and sliding members, but these are subject to scoring, seizing and/or galling from the aluminum-toaluminum contact and also produce an objectionable metallic noise when the sliding members are moved; all of which objections the present structure eliminates.

It is also desirable that the window sashes and the screen panels be capable of sliding smoothly and silently within their tracks, and that the degree of tit between the frame and the said sliding sash members be sufiiciently tight so that substantially no air can leak thereby. Further, it is desirable that such smooth operation and effective sealing be present in the window assembly, both initially and during continued exposure to the weather.

The present window assembly utilizes a channel or track lined with a material which insures easy sliding and quiet movement of the window sash disposed therein, and which is uniquely shaped to substantially provide a line contact to insure a complete seal against air leaks past the sides of the sashes. Further, the window assembly of the invention is constructed so that the liner material is permanently secured in the tracks. It is further desirable that means be provided to latch the window sash and screen elements against operation from the outside thereof, to thereby prevent the entrance of prowlers. To this end the latch means employed in the present invention will, when engaged, prevent movement of the sliding elements from the outside of the structure; secure said sliding elements against tampering from the outside; and be easily engaged and disengaged from the inside.

The upper and lower window sashes of the present invention are provided with a novel latch assembly and lock therefor which are automatically rendered effective when said sashes are in their respective closed positions, and which present no structure that can be efiiectively tampered with from the exterior of the window to release the latch. Further, the screen panel is provided with a manually operable combination handle and latch that locks it in its closed position. Thus, a window assembly is provided which, when properly latched, cannot be unlocked from the outside, except by breaking the glass when the sashes are closed, or by tearing the screen when the lower sash is raised.

It is an object of this invention to provide an automatically engageable latch assembly for a pair of sliding sashes so constructed that when latched, neither sash can be raised or opened from the outside.

Another object is to provide a metallic frame window fitted with sliding window sashes, so constructed that said sashes may be smoothly moved up and down, and wherein substantially no air leakage will occur between said sashes and the frame within which they are mounted.

A further object is to provide a metallic frame for a storm sash assembly provided with means adapting it for hatnt use with a given range of diiierent sized window openings.

It is also an object to provide a lined track for a sash that can be economically constructed and which will permit a sliding window sash disposed therein to be easily raised and lowered, while at the same time eliminating the necessity for separate weather stripping.

Another object is to provide liner means for the track of aluminum prime or storm window frames that will eliminate scoring, seizing and galling by screen and/or sash elements slidably mounted therein.

A still further object is to provide a metallic window frame and sash assembly designed to prevent the leakage of air between the sashes and the frame.

It is also an object to provide a Window assembly including a screen panel designed so that when said screen panel is in properly closed position, no insects can pass around it.

A further object is to provide a combination handle and latch for a window screen panel, so constructed that when said screen panel is in its closed position, the handle can be swung to a latching position to lock the screen closed.

Other objects and many of the attendant advantages of the invention will be readily apparent from the following detailed description when considered in connection with the accompanying drawings, wherein:

FIG. 1 is a view in elevation of a combination storm window and screen assembly constructed according to the invention, the assembly being illustrated as it appears from the inside of the structure in which it is mounted; and with the screen partly raised to reveal the latch means on the lower sash;

FIG. 2 is an elevation similar to FIG. 1, except that the window assembly is shown as viewed from the exterior of said structure;

FIG. 3 is an enlarged sectional view looking downwardly along line 3-3 of FIG. 2, showing in particular the lined tracks and the latch-locking bar carried by the lower sash;

FIG. 4 is an enlarged vertical sectional view taken along line 4-4 of FIG. 2, showing in particular the combined handle and latch for the screen panel, and the sealing arrangement for the horizontal members of the sliding window sashes;

FIG. 5 is an enlarged fragmentary sectional View taken along line 55 of FIG. 4, showing one of the novel window latching elements mounted in the lower member of the upper sash; and

FIG. 6 is an enlarged cross-sectional view taken along line 66 of FIG. 5, further showing in detail the construction of the window sash latch, the locking bar there for, and the sealing elements between the sashes.

The present combination storm window and screen assembly is associated with an extruded metallic outside frame for permitting adjustment, during installation, of the frame for the sashes and screen relative to window openings of various sizes. The metallic sash frame has three tracks therein for receiving two window sashes and a sliding screen panel, each track having a zinc liner, mounted therein and especially formed to insure both silent and smooth movement of the window sashes, and substantially complete sealing between the frame and said sashes. The screen panel is equipped with a pivoted handle which engages over the bottom edge of the sash frame when said screen panel is at the lower end of its track, in which position the panel can be latched closed.

The upper of the window sashes has a pair of spring biased latches projecting to the exterior at the sides thereof for fixing it in position relative to the frame. The sash latches are designed to automatically cooperate with a locking bar on the lower sash when both sashes are in their closed position, whereby the latches cannot be released from the outside.

Referring now to the drawings, a building wall is indicated at 2 and has a rectangular window opening 4 therein, said opening being framed in the usual manner with wood and having a conventional wooden sill 6 (FIG. 4). Fitted into the opening 4, from the outside of the wall 2, and in abutment with the usual wooden framing members 8 is a mounting frame 9 and a combination storm window and screen assembly 10, the principal elements of which are of extruded aluminum.

The assembly 10 includes a rectangular frame 12, which comprises a pair of extruded vertical side members 14 and 16 connected at their top and bottom to an extruded header 18 and a bottom rail 20, respectively. The manner in which the side members, header and rail elements are interconnected is not a part of this invention, and hence is not shown or described in detail. The extruded vertical side walls 14 and 16 have a pair of spaced, parallel flanges 19 and 21, respectively, projecting therefrom, and the header and rail have similar spaced, parallel flanges 22 and 24, respectively, thereon.

The mounting frame 9 comprises a pair of channelshaped side members 26 and 28 that slidably extend over the external surface of the flanges 19 and 21, respectively, and are secured thereto by sheet-metal screws 30. The channel members 26 and 28 permit the window assembly 10 to be fitted and centered into openings of various widths, said channels being carried by the side members 14 and 16 merely and slid outwardly into engagement with the opening walls, after which holes are drilled therethrough from the inside of the building and the aforesaid screws 30 are installed. The wall-engaging exterior bottom surface of the members 26 and 28 have sharp, longitudinally-extending ribs 32 thereon which bite into the wooden framing 8 of the opening 4 to thus secure the window assembly in position. Screws 33, which are aligned with openings 33 in the side members 14 and 16 further secure the members 26 and 28 in place.

The window assembly 10 is also adaptable to openings of varying heights. Thus, telescopically received within the parallel flanges 24 on the rail member is a sill extension 34 (FIG. 4), comprising a pair of legs 36 and 38 connected by a web 40. The legs 36 and 38 project unequal distances from the sill member 211) to compensate for the usual slope of the wooden window frame sill 6. The extension 34 is secured in position by screws 39. A header extension 41 has flanges 43, which receive therebetween the flanges 22 of the header 18, and are secured to said header by screws 45.

The side member 14 has three vertical, parallel tracks or channels 42, 44 and 46 therein, said channels being disposed to confront similar but shallower channels 48, 50 and 52, respectively, in the side member 16 (FIG. 3). The inner ends of the walls of side member 14 separating the channels 42 and 44 and the channels 44 and 46 are each generally T-shaped, the cross-bars 54 and 56 of said T -shaped walls extending into their adjacent channels to define longitudinally-extending flanges. The walls separating the channels 48, 50 and 52 in the side member 16 have similar flange-defining cross-bars 58 and 60 thereon.

Disposed within each of the channels 42, 44 and 46 is a liner 62 constructed of zinc which is relatively soft and somewhat resilient and provides a non-corroding, low friction surface for engagement by the sashes. The liner 62 has a thickness of about 0.010" and is U- or channelshaped. The forward edges of the opposite sides of the channel are inturned, as at 64 to form a bead that will snugly engage the sides of a sash member disposed therebetween, as will be explained later. The liners 62 extend throughout the length of the channels in which they are received and the sides thereof have a height substantially equal to the depth of the respective channels within which they are disposed. In assembling the liners 62 in their respective channels, an adhesive is first applied along the length of said channels and theliners are then inserted 4 and pressed inwardly to contact the adhesive. At least one of the inturned edges on each liner is urged inwardly by one of the flanges formed by the crossbars 54 and 56.

The relatively shallow channels 48, 50 and 52 in the side member 16 have disposed therein liners 66 identical in construction and purpose to the liners 62, said liners 66 being equal in height to the depth of their associated channels. The liners are likewise secured within their associated channels by a suitable adhesive, although it is contemplated that other securing means, such as spot welding, might be utilized.

The confronting channels 46 and 52 and the confronting channels 44 and 50 receive therein the opposite side edges of the upper and lower window sashes 68 and 70, respectively. The frames of sashes 68 and 70 each have a width just slightly less than the distance measured between the cross-bars 54 and 58 and the cross-bars 56 and 66, whereby they may be inserted and removed after the side members 14 and 16 have been installed; the side edge of each sash 68 and 70, which is received within the relatively deep grooves in the side member 14, has a leave spring 72 and 74, respectively, mounted thereon, which springs insure that said sashes will stay in position within their channels. The outside edges 76 and 78 of the side members 14 and 16 project inwardly toward each other sufficiently so that the distance therebetween is less than the width of the sashes 68 and 70, and thus facilitate the placing of the sashes within their associated channels.

The side edges of the sashes 68 and 78 are snugly engaged by the bead formed by the inturned edges of their respective liners 62 and 66, and are thus sealed thereby and require no additional weather stripping in the channel tracks. Further, because the liners are constructed of zinc or a similar material having self-lubricating characteristics, the sash will slide easily and quietly, while remaining tightly sealed. As is best shown in FIG. 4, the top, horizontal member 77 of the upper sash 68 is generally H-shaped in cross-section, the downwardly-facing channel of said member being lined with a gasket 79 and receiving the upper edge of a glass pane 80. The header 18 has a horizontally-extending, integral, projecting hollow track 82, which is receivable Within the upper channel of the member 77 and which mounts the backing of a strip of piled weather stripping 84, whose pile projects through a slit therein and into engagement with one wall of the member 77. A similar track 86, carrying piled weather stripping 88, projects upwardly from rail 20 and is received Within the downwardly-facing channel of an H- shaped bottom member of the lower sash 70. The upper and lower edges, respectively, of the upper and lower sashes are thus sealed relative to the members 18 and 20 when the sashes are in their closed positions.

The upper and lower horizontal members 92 and 94 of the lower and upper sashes '70 and 68, respectively, are also generally H-shaped in cross-section. The face of the member 92, which confronts member 94, has a tapered lip 96, FIG. 6, thereon which, when the sashes are both closed, is received within a groove on the latter member defined by a similar lip 98. The member 94 has a track thereon positioned below lip 98, which mounts a Weather strip 102 that is engageable with the outerside of the glass of the lower sash 70 and with the member 92. Thus, when the sashes are closed, the mating, opposed edges thereof are sealed both by the interengaged lips 96 and 98 and by the piled weather stripping 102.

The lower member 90 of the bottom sash 70 has confronting ventilation openings 104 and 166, FIGS. 1 and 2, in the inner and outer webs, respectively, thereof and a sliding bar 108 (FIGS. 1, 2 and 4) having similarly shaped openings therein is disposed within the member 90 and is slidable by a manual movement of a lug 110 to open and close said openings. Thus, limited ventilation can be provided without opening the sashes. Further, the member 90 has spring-biased, combined lift and latch devices 112 mounted thereon at the opposite ends thereof,

which devices include latch bolts (not shown) engageable in spaced holes 113 (FIG. 4) in the bottom of channels 44 and 50 to secure the sash 70 in either a fully closed position or in a selected open position. The latch devices 112 are preferably of the general sliding type disclosed in US. Patent 2,860,745, and hence are not illustrated or described in detail herein.

The bottom member 94 0f the upper sash 63 carries thereon a pair of identically-constructed latch devices 114, best shown in FIGS. 4 to 6. Each latch device 114 includes a generally rectangular bolt portion 116 slidably disposed within the downwardly facing channel, or track, of H-shaped member 94. The lower edges 118 of said channel, or track, project inwardly to contain said bolt and to define a slot through which an actuating finger 129, formed integral with said bolt, projects.

The side wall of the member 94, which faces the member 92, has an elongated slot 122 in each end thereof positioned medially of the latch bolt 116, and a threaded locking stud 124, having an elongated cylindrical head thereon, extends through each slot and is threaded into a bore in said latch bolt. The locking studs function to retain their respective bolts in position while allowing limited translational movement to permit lowering of the upper sash 68, and additionally serve another function to be described hereinbelow.

Each latch bolt 116 has a dowel 126 projecting from the inner end face thereof, over which dowel one end of a compression spring 128 is received. The opposite end of said spring is anchored over a tongue 1313 struck downwardly from the member $4. The spring 128 thus functions to urge the latch bolt 116 toward the side member within which the sash is mounted. The outer ends of the latch bolts 116 are reduced in width for reception within vertically spaced openings 132 in the bottom of their associated channel, and are cha-mfered on their upper corners 13d, whereby to facilitate upward movement of the sash when the latch bolts are not completely retracted against their springs.

The sashes $8 and 71B are especially constructed so that when both are fully closed the latch bolts 116 cannot be retracted from the outside; thus, the sashes cannot then be opened. This automatic latching is accomplished by a locking bar 136 (FIGS. 3 and 6) formed integrally on the upper member 92 of the lower sash 70, from which locking bar the lip 96 projects. The length of the locking bar 136 is slightly less than the distance between the studs 124 when the outer ends of the bolts 116 are advanced or fully received within their respective openings 132. Thus, when the sashes are arranged so that the bar 136 is between the studs 12-1 (FIG. 3) the studs cannot be moved, and the upper sash therefor cannot be unlocked and moved downwardly.

It is to be understood that the openings 132 are disposed in the confronting side members 14 and 16 to receive the latch bolts 116 when the upper sash 68 is fully closed. Thus, when the lower sash 70 is similarly closed, the bar 136 will automatically be properly positioned with its ends adjacent the studs 124 to secure the latch bolts 116 against movement.

It should be noted that the latch bolts 116 are so constructed and mounted that they cannot be tampered with from the outside when the bar 136 is in locking position, there being no screws or separable elements that might be disassembled from the outside to detach the latch bolts. Further, the locking bar 136 is disposed above the track 100 on the sash 68 which bears the lip 98; thus, the bar 136 cannot be reached from the outside when it is in its locking position. It is thus apparent that a tamper-proof latching device has been provided by the present invention.

The storm window assembly of the present invention is also provided with a screen panel 138, said panel including a pair of side frame members 140 and 142, a top frame member 144, and a bottom frame member 146. The four frame members are connected at their corners in the usual manner, and a groove 148 extends around the inner peripheries of said assembled frame members on the faces thereof which confront the window sashes. A sheet of screen material 150 is secured to the screen frame by a strip of rubber 152, which is wedged into the groove 148 together with the edges of said screen material 150, thereby completing the panel 138.

The side edges of the panel 138 are received within the opposed grooves 42 and 48 in the side members 14 and 16, respectively, and the side frame member 1411 has attached thereto an outwardly bowed leaf spring 154, which is identical in construction and purpose to the similarly-shaped leaf springs 72 and 74. It should be noted that aside from the function of the leaf springs 154 of urging screen panel toward the opposite side member 16 to thus retain the screen within its channels, the leaf spring 154 also creates a force sufiicient to hold the screen at any desired position or elevation along the length of said channels.

The top frame member 144 of the screen 138 has a longitudinally extending, downwardly-directed lip 156 on the face thereof which confronts the lower sash 7t), and the lower member 90 on the sash has an upwardlydirected lip 158 thereon which confronts the lip 156. As is readily apparent from an examination of FIG. 4, the two confronting lips 156 and 158 will mate in a manner analogous to the lips 96 and 98 when the screen 138 is fully lowered, or closed, and the lower sash 70 is fully raised, or opened. When the sash 70 and the screen 138 are in the aforesaid position, and the lips 156 and 158 are mated, the space between the sash and screen will be sealed against the passage of insects and the like.

The lower frame member 146 of the screen 138 is provided with a handle 160 to facilitate raising and lowering thereof, said handle also functioning to lock the panel in its fully lowered, or closed, position. The handle 160 comprises a piece of heavy gauge wire bent to form a loop, said loop including a pair of sides 162 and a bottom 164; the two ends of the loop (not visible) are pivotally received within an opening in a bracket 166, said bracket being secured to the member 146 centrally thereof by screws 165.

The bottom 164 of the loop defining the handle has a tab 168 bent thereinto which projects at an angle slightly less than degrees from a plane containing the loop sides 162 and the bottom 164. The tab 168 is receivable over a flange 1719 on the rail 21} when the screen 138 is in its lowered, closed position (shown by phanton lines in FIG. 4), and in that position functions to lock said screen in its closed position. The slightly less than 90 degree angle of projection of the tab 168, coupled with the resilient nature of the wire loop, retains the handle in its locking position against accidental reease.

The invention has been shown and described with respect to a vertically disposed window, with the sashes and the screen panel moving vertically. Obviously, the teachings of the invention would also extend to a horizontally or otherwise disposed window. Further, it is to be understood that, if desired, only one latch 114 could be employed, rather than two, which is preferable, and that in this instance the locking bar would still function in the same manner.

Obviously, many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

1. A metallic window assembly, comprising: a frame including a pair of spaced metallic side members each having a longitudinally extending channel therein, said channels including side walls and the channel in one side member being disposed to confront a corresponding channel in the other side member, whereby to define pairs of confronting channels; a slidable member disposed between said side members, and including metallic portions at its opposite sides which are sli-dably received within said confronting channels; a U-shaped metallic liner disposed in each of said channels, said liner including sidewalls having inturned forward edges forming beads snugly embracing the opposite faces of the metallic side portions of said slidable member disposed within said channels, the metallic side portions of said slidable member received within said channel being solely in con-i tact with said liner and being prevented by said liner from directly engaging the metallic walls of said channel; and an inwardly directed, longitudinally extending flange on at least one of the side walls of each channel, positioned to engage the outer side of one of the side walls of the liner disposed in the channel adjacent the inturned forward edge thereon, said liners being made of a metallic material that is different from the metallic material of said slidable member side portions to provide lowfriction, non-galling, bearing surfaces for quiet, easy sliding movement of said slidable member relative to said side members.

2. Ametallic window assembly, comprising: a frame including a pair of spaced metallic side members each having a plurality of parallel, longitudinally extending channels therein, said channels each being defined by a pair of side walls and a bottom wall and the channels in one side member being disposed to confront corresponding channels in the other side member whereby to define pairs of confronting channels; a first metallic sash disposed between said side members with portions of its opposite sides slidably received within one pair of said confronting channels; a second metallic sash disposed between said side members and having portions of its opposite sides slidably received within a second pair of said confronting channels; a metallic liner disposed within each of said channels, each of said liners including a pair of side walls and a bottom wall, the forward edges of said side walls being folded inwardly upon themselves to define longitudinally extending beads, said beads of each liner being arranged to snugly embrace the confronting faces of the metallic sash side portion associated therewith, the opposite sides of said metallic sashes received within said channels being solely in contact with said liners and being prevented by said liners from directly engaging the metallic walls of said channels; and

an inwardly directed, longitudinally extending flange on the forward edge of at least one of the side walls of each channel positioned to engage the outer side of one of the side walls of the liner disposed in said channel adjacent its forward edge, said liners being made of a metallic material that is relatively softer than the metallic sash material to provide low-friction bearing surfaces for quiet, easy sliding movement of said sashes relative to said side members.

3. A metallic window assembly as recited in claim 2, wherein the liner is made of zinc and is bonded in place in said channel.

.4. A metallic window assembly, comprising: a frame including a pair of spaced metallic side members each having a plurality of parallel, longitudinally extending channels therein, said channels each being defined by a pair of side walls and a bottom wall, the channels in one side member being disposed to confront corresponding channels in the other side member, whereby to define pairs of confronting channels; a first metallic sash disposed between said side members with portions of its opposite sides slidably received within one pair of said confronting channels; a second metallic sash disposed between said side members and having portions of its pp es s dab y received within a second air of said confronting channels; a metallic liner secured within each of said channels, each of said liners including a pair of side walls and a bottom wall, the forward edges of said side walls being folded inwardly upon themselves to define longitudinally extending beads, said beads of each liner being arranged to snugly embrace the confronting faces of the metallic sash side portions associated therewith, the opposite sides of said metallic sashes received within said channels being solely in contact with said liners and being prevented by said liners from directly engaging the metallic walls of said channels; an inwardly directed, longitudinally extending flange on the forward edge of at least one of the side walls of each channel positioned to engage the outer side of one of the side walls of the liner disposed in said channel adjacent its forward edge, said liners being made of a metallic material that is relatively softer than the metallic material of said sashes, at least one of said first pair of channels and its associated liners having vertically spaced openings in the bottom thereof; at least one one-piece latch bolt mounted within a channel in said first sash for translational movement in directions toward and away from said openings and having a portion thereon receivable within said openings; a stud fixed on said latch bolt and extending through a continuous elongated slot in the side wall of said first sash, said stud projecting from said first sash; and a projection on and movable with said second sash toward and away from a position confronting said stud, said stud being engageable with said projection when the latter is in said confronting position to thereby prevent translational movement of said latch bolt in a direction away from said openings.

5. A metal window assembly as recited in claim 4, including resilient means disposed to urge said latch bolt toward said openings, and a manually engageable actuating finger connected with said latch bolt and projecting from said first sash, said actuating finger being operable to move said latch bolt in a direction away from its associated opening.

6. A metallic window assembly as recited in claim 4, including latch means mounted on said second sash and cooperable with means on at least one of said side members for locking said second sash against vertical movement relative to said side members.

7. A metallic window assembly as recited in claim 4, including a screen panel disposed between said side members and having portions of its side edges received within a third pair of said confronting channels; first sealing means adjacent the lower edge of said first sash and engageable with means adjacent the upper edge of said second sash for sealing between said sashes when said lower and upper edges thereof are positioned adjacent each other; and second sealing means on the upper edge of said screen panel and engageable with means adjacent the lower edge of said second sash for sealing between said second sash and said screen panel when said upper and lower edges are positioned adjacent each other.

8. A metallic window assembly as recited in claim 7, wherein both said first and said second sealing means include confronting, longitudinally-extending, interengageable lips on each of said edges.

9. A metallic window assembly as recited in claim 7, wherein the frame includes a bottom rail, and wherein handle means is pivotally mounted on said screen panel, said handle means including a projecting tab engageable under an edge of said bottom rail for securing said screen panel against movement relative to said bottom rail.

10. A metallic window assembly as recited in claim 7, wherein both said first and said second sealing means include confronting, longitudinally extending, intererrgageable lips on each of said edges, and wherein one of said lips constitutes the projection on the second sash for preventing movement of said latch bolt means.

11. A window assembly, comprising: a frame including a pair of spaced side members each having a plurality of parallel, longitudinally extending channels therein, the channels in one side member being disposed to confront corresponding channels in the other side member, whereby to define pairs of confronting channels; a first sash including top, bottom and side members, said first sash being disposed between said frame side members with portions of its side members slidably received within a first pair of said confronting channels, the bottom member of said first sash having a latch bolt-receiving track in at least one end thereof arranged to extend generally normally to said frame side members, said bottom member further having a slot in the undersurface thereof opening into said track, both said track and said slot opening at their outer ends into the channel associated therewith, there being longitudinally spaced openings in the bottom of said channel; a second sash disposed between said frame side members and having portions of its opposite sides slidably received within a second pair of said confronting channels, said second sash including a top member; a one-piece latch bolt slidably disposed in said track, and including a nose portion receivable Within each of said openings and a depending actuating finger received within and projecting beyond said slot, the first sash bottom member having a side wall which faces toward said second sash, and which has a closed, elongated slot therein positioned to intersect and extending longitudinally of said track, said elongated slot having side edges that are unbroken and generally parallel throughout their length; a locking stud secured to said latch bolt and having a head projecting through said elongated slot and outwardly from said first sash bottom member toward said second sash, said locking stud cooperating with said closed elongated slot to retain said latch bolt within said track; resilient means disposed between said bottom member and the inner end of said latch bolt for urging said latch bolt toward latched position relative to its associated channel; and detent locking means on said second sash top member, said detent locking means being positioned inwardly of and being aligned with said head of said locking stud when said nose portion of said latch bolt is in latched position within a predetermined one of said openings and said sashes are in closed position relative to each other within said frame, to prevent movement of said latch bolt from a latched to an unlatched position.

12. A window assembly as recited in claim 11, including additionally an element projecting from said side wall of said first sash bottom member which faces toward said second sash, said element being disposed below said elongated slot and being positioned to shield said detent locking means and said locking stud against tampering when said latch bolt is in a latched position and said sashes are in closed position.

13. A metallic window assembly as recited in claim 11, wherein said first sash bottom member includes a boltreceivin'g track in each end thereof, there being an elongated slot in communication with each track, a one-piece latch bolt received in each track, and a locking stud secured to each latch bolt, said locking studs being aligned, and said detent locking means comprising: an elongated bar fixed to said top member of said second sash, said bar having a length slightly less than the distance measured between said locking studs when both of said latch bolts are in latched positions, and being arranged to be positioned between said locking studs when said sashes are in closed position relative to each other.

14. A metallic window assembly, comprising: a frame including a pair of spaced side members each having a plurality of parallel, longitudinally extending channels therein, the channels in one side member being disposed to confront corresponding channels in the other side member, whereby to define pairs of confronting channels; a first sash, including top, bottom and side members, said first sash being disposed between said frame side members with portions of the opposite sash sides slidably received within a first pair of said confronting channels, the bottom member of said sash having a bolt-receiving track in each end thereof; a second sash disposed between said side members and having portions of its opposite sides slidably received within a second pair of said confronting channels, both of said first pair of channels having longitudinally spaced openings in the bottom thereof; a one-piece latch bolt disposed in each of said tracks in said first sash bottom member for horizontal translational movement, and each having a portion thereof normally receivable within said openings, said first sash bottom member having a pair of continuous elongated slots in the side wall thereof, one of said elongated slots being positioned to intersect each said track and to confront the central position of said latch bolt received therein; a locking stud secured to each said latch bolt and arranged to project through the associated elongated slot and outwardly from said bottom sash member toward said second sash, said locking studs being aligned; detent locking means on said second sash engagable with said locking studs to prevent said translational movement from a latched to an unlatched position when said sashes are positioned in a predetermined relationship relative to each other within said frame, said detent locking means comprising an elongated bar fixed to the upper end of said second sash, said bar having a length slightly less than the distance measured between said locking studs when both of said latch bolts are in latched positions, and being arranged to be positioned between said locking studs when said sashes are in said predetermined relationship relative to each other, said bar having a first longitudinally extending sealing lip thereon; and a second, longitudinally extending sealing lip on the bottom member of said first sash positioned to confront and mate with said first sealing lip when said sashes are moved to position said locking bar between said studs, said second sealing lip being positioned below said first sealing lip and shielding said locking bar and said locking studs when said first and second sealing lips are in mating engagement.

References Cited by the Examiner UNITED STATES PATENTS 1,815,718 7/1931 Lane l8975 1,847,957 3/1932 Hamm 18975 2,135,680 11/1938 Sharp 18972 2,611,934 9/1952 Milone 189-72 2,640,535 6/1953 Milone 189-72 2,719,614 10/1955 Sylvan 189-75 2,730,776 1/ 1956 Flicker 189-72 2,757,419 8/1956 Balintfi 2052 2,761,498 9/1956 Reinhardt 20-55 2,812,836 11/1957 Zitomer 139-72 2,904,855 9/1959 Hagerty 2052 2,970,642 2/1961 Parsons l60--40 HARRISON R. MOSELEY, Primary Examiner.

REINALDO P. MACHADO, Examiner. 

1. A MATALLIC WINDOW ASSEMBLY, COMPRISING: A FRAME INCLUDING A PAIR OF SPACED METALLIC SIDE MEMBERS EACH HAVING A LONGITUDINALLY EXTENDING CHANNEL THEREIN, SAID CHANNELS INCLUDING SIDE WALLS AND THE CHANNEL IN ONE SIDE MEMBER BEING DISPOSED TO CONFRONT A CORRESPONDING CHANNEL IN THE OTHER SIDE MEMBER, WHEREBY TO DEFINE PAIRS OF CONFRONTING CHANNELS; A SLIDABLE MEMBER DISPOSED BETWEEN SAID SIDE MEMBERS, AND INCLUDING METALLIC PORTIONS AT ITS OPPOSITE SIDES WHICH SLIDABLY RECEIVED WITHIN SAID CONFRONTING CHANNELS; A U-SHAPED METALLIC LINER DISPOSED IN EACH OF SAID CHANNELS, SAID LINER INCLUDING SIDEWALLS HAVING INTURNED FORWARD EDGES FORMING BEADS SNUGLY EMBRACING THE OPPOSITE FACES OF THE METALLIC SIDE PORTIONS OF SAID SLIDABLE MEMBER DISPOSED WITHIN SAID CHANNELS, THE METALLIC SIDE PORTIONS OF SAID SLIDABLE MEMBER RECEIVE WITHIN SAID CHANNEL BEING SOLELY IN CONTACT WITH SAID LINER AND BEING PREVENTED BY SAID LINER 